Magnetic emulsions as contrast agents for subsurface applications
US11506049B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 13, 2020 |
| Grant date | Nov 22, 2022 |
| Priority date | — |
| Expiry date | Aug 13, 2040 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC09K2208/14
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
Provided is an injection fluid that may include a nanoemulsion having an oil phase dispersed in an aqueous phase, and non-superparamagnetic magnetic nanoparticles that are present in the dispersed oil phase. Further provided is a method for preparing an injection fluid that may include preparing a nanoemulsion from an aqueous phase and an oil phase having non-superparamagnetic magnetic nanoparticles therein, and may be used to form nanodroplets of the non-superparamagnetic magnetic nanoparticles. Further provided is a method for tracking movement of an injection fluid. The method may include introducing a tagged injection fluid into a hydrocarbon-containing reservoir, the tagged injection fluid may be a nanoemulsion that includes: an aqueous phase, an oil phase dispersed in the aqueous phase, and non-superparamagnetic nanoparticles that are present in the dispersed oil phase; and tracking the movement of the tagged injection fluid.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.